[Paraview] Output of ParallelUnstructuredGridWriter running on multiple nodes

[Hong Yi]

I am running a simulation in-situ linked with ParaView CoProcessing library with a pipeline that includes "slice->Integrate Variables Filter->ParallelUnstructuredGridWriter" so that integrated velocity value for a slice at each time point can be written out while running the simulation in-situ. The output from this ParallelUnstructureGridWriter for each time step includes one pvtu file plus one vtu file from each running node, so that is a lot of output files for each time point especially when running on a large number of nodes in parallel. However, it looks like only the output vtu file from processing node 0 includes valid velocity range value while other output vtu files from other nodes include only blank/empty values. So I am wondering whether there is a good way to set up only outputting vtu file from processing node 0 to prevent output of those large number of files that don't include valid/useful values. Any suggestions are very much appreciated.

Thanks,

Hong
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